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denoland-deno/tests/unit_node/assertion_error_test.ts

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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { stripAnsiCode } from "@std/fmt/colors";
import { assert, assertStrictEquals } from "@std/assert";
import { AssertionError } from "node:assert";
Deno.test({
name: "construct AssertionError() with given message",
fn() {
const err = new AssertionError(
{
message: "answer",
actual: "42",
expected: "42",
operator: "notStrictEqual",
},
);
assertStrictEquals(err.name, "AssertionError");
assertStrictEquals(err.message, "answer");
assertStrictEquals(err.generatedMessage, false);
assertStrictEquals(err.code, "ERR_ASSERTION");
assertStrictEquals(err.actual, "42");
assertStrictEquals(err.expected, "42");
assertStrictEquals(err.operator, "notStrictEqual");
},
});
Deno.test({
name: "construct AssertionError() with generated message",
fn() {
const err = new AssertionError(
{ actual: 1, expected: 2, operator: "equal" },
);
assertStrictEquals(err.name, "AssertionError");
assertStrictEquals(stripAnsiCode(err.message), "1 equal 2");
assertStrictEquals(err.generatedMessage, true);
assertStrictEquals(err.code, "ERR_ASSERTION");
assertStrictEquals(err.actual, 1);
assertStrictEquals(err.expected, 2);
assertStrictEquals(err.operator, "equal");
},
});
Deno.test({
name: "construct AssertionError() with stackStartFn",
fn: function stackStartFn() {
const expected = /node/;
const err = new AssertionError({
actual: "deno",
expected,
operator: "match",
stackStartFn,
});
assertStrictEquals(err.name, "AssertionError");
assertStrictEquals(stripAnsiCode(err.message), `'deno' match /node/`);
assertStrictEquals(err.generatedMessage, true);
assertStrictEquals(err.code, "ERR_ASSERTION");
assertStrictEquals(err.actual, "deno");
assertStrictEquals(err.expected, expected);
assertStrictEquals(err.operator, "match");
assert(err.stack, "error should have a stack");
assert(
!err.stack?.includes("stackStartFn"),
"stackStartFn() should not present in stack trace",
);
},
});